/**
 * Copyright (c) <2010>, <SUNNY GUPTA>
 * All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of the <ORGANIZATION> nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <SUNNY GUPTA> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.gwtp.investmentadvisor.server.core.cacheservice.impl;

import java.util.HashMap;
import java.util.Map;

import net.sf.jsr107cache.Cache;
import net.sf.jsr107cache.CacheException;
import net.sf.jsr107cache.CacheFactory;
import net.sf.jsr107cache.CacheManager;

import com.google.appengine.api.memcache.stdimpl.GCacheFactory;

/**
 * This class wraps the JSR107 Cache and securely manages the instance.
 * @author Sunny Gupta
 * @deprecated Its better to use an implementation of {@link CacheService} as its 
 * closer to {@link MemcacheService}
 *
 */
public class JSRWrapperCacheService {
  private int relativeExpirationTimeInSeconds;

  public JSRWrapperCacheService(int relativeExpirationTimeInSeconds) {
    this.relativeExpirationTimeInSeconds = relativeExpirationTimeInSeconds;
    // Lazy load cache
    this.cache = null;
  }
  
  private Cache cache;
  
  private void createCache() throws CacheException {
    //  Make sure to check for already instantiated cache object
    if (cache == null) {
      Map<Object,Object> props = new HashMap<Object, Object>();
          props.put(GCacheFactory.EXPIRATION_DELTA, relativeExpirationTimeInSeconds);

          CacheFactory cacheFactory = CacheManager.getInstance().getCacheFactory();
          cache = cacheFactory.createCache(props);
    }
  }
  
  public final Cache getCacheInstance() throws CacheException {
    // Initialize
    createCache();
    // return
    return this.cache;
  }
  
  public final String generateCacheKey(Object value, String uniqueIdentifier) {
    // Form the key
    return value.toString() + uniqueIdentifier;
  }  
}